Steam-actuated valve for pumps



(No Model.)

- I L.LAMY.

STEAM ACTUATED VALVE FOR PUMPS.

Patented Sept. 11, 1883.

L t I x I/l in v E 1 t d f E I en Wash NITED STATES PATENT OFFICE.

Louis LAMY, orwns'r HOBOKEN, NEW JERSEY.

STEAM-ACTUATE D VALVE FOR PUMPS.

SPECIFICATION forming part of Letters Patent No. 284,744, dated September I1, 1883.

- Application filed February 9, 1883. (No model.)

To all whom it may concern Be it known that I, LOUIS LAMY, a citizen of the United States, residing at West Hoboken, in the county of Hudson and State of New Jersey, have invented a new and useful Improvement in Steam-Actuated Valves for Steam-Pumps, of which the following is a specification.

My invention relates to that class of steam-- pumps where the valve for governing the supply of steam to the cylinder is moved or actuated by steam instead of being operated by other mechanism from thepiston or crankshaft.

' The object of my invention is to devise an arrangement of valves with ports or steam passages that may be applied to any steampump now using the plain or common slide valve, thereby saving the expense of the complicated side rods, crankshaft, and other extra parts requisite for operating said valve. The object further is to furnish a simple contrivance, which is positive and accurate in its movements, and not liable to get out of order as the present system of valves of this class do, which will be more fully hereinafter explained, reference beinghad to the accompanying drawings, in which- Figure 1 represents an elevation of a steamcylinder, steam-chest, and valve-section, x m, Fig. 2. Fig. 2 represents end view of same section at y Fig. 1. Fig. 3 shows plan of small slide-valve; Fig. 4, section of same at z 2,- Fig. 5, section of same at a a. Fig. 6 shows plan of ports of valve-case.

Similar letters refer to similar parts through out the several views.

A represents steam cylinder; B, steamchest; 0, valve-case; D, valve; E, valve-seat on steam-cylinder as used in common slidevalves; F, auxiliaryvalve. Thevalve-case C, which has ports or openings at to correspond with ports I) of steam-cylinder, is secured in position by set-screws d, as shown, or other suitable device. The ports to extend through the case 0 into the valve-chamber G, and also correspond with openings 6 in valve 1). The valve F is of the slide-valve type, and has suitable ports.

To operate the above, steam is admittedinto the steam-chest B, which surrounds the valvecase 0, and flows into the cylinder A through the ports 0,6, a, and b, forcing the piston H to the end of its stroke, thereby causing the arm K, which is attached to the piston-rod, to come in contact with collar 9 on valve-stem m, moving the auxiliary valve F from over the steam-port f, and at the same time closing steam-port j" and opening exhaust-port f admitting the live steam into valve-chamber G through port S, and forcing the valve D in the opposite direction from that shown in drawings, andopening the ports 0, e, a, and b, and admitting steam on the opposite side of the piston H. The exhaust-steam from the valvechamber G escapes through the ports S and f 3/ into the exhaust-port b, which is connected with main exhaust-port L of steam-cylinder. To prevent the valve D from-being forced too hard against the head of the chamber G, I have a small port, h, through the case C,-which corresponds with the port h, (shown by dotted lines, Fig. 1,) and admits live steam into the chamber G, thereby forming a cushion for the valve D, (shown as admitting steam at h", Fig. 1.) WVhen the piston arrives at the other end of stroke, the auxiliary valve F is moved in the opposite direction by a similar collar on valvestem 'm, and the operation as above described is repeated. The valve Dv being cylindrical, it is prevented from turning bysetscrew a in case 0, and fitting into an elongated slot in surface of valve D, but is allowed to move freely endwise. Thus it will be seen by this arrangement I have a positive movement-of the valve, allowing the steam to have full port the entire length of stroke, and operating e11- tirely noiseless either when running the pump fast or slow, and can be readily applied to the present make of steam-pumps.

Having described my invention, what I claim The valve D, with ports 6, s, and h, valvecase 0, with its ports a, 0,0, f, f, f f 1), and h, and auxiliary valve F, with bars or bridges 1;, all arranged substantially as described, for the purpose specified. 

